Although there is no special preparation required for most x-rays, you may be asked to change into a comfortable robe before your exam. Metal objects can affect the image, so on the day of your exam, avoid clothing with zippers and snaps if possible. You may be asked to remove hairpins, jewelry, eyeglasses and hearing aids depending on which body part is being examined. Women should always inform their doctor and/or technologist if there is any possibility that they may be pregnant.